Complex number problem

  • #1
Someone solve this please!!!!!

If z= CosA+iSinA, express 2/1+z in the form I-Tan(kA).
 

Answers and Replies

  • #2
dextercioby
Science Advisor
Homework Helper
Insights Author
13,114
665
Well,what is that number (2/(1+z)) equal to?

And what do you mean by "I-Tan(kA)"...?

Daniel.
 
  • #3
where k is a constant and A is the angle from above, it says to express the answer in that form- z is a complex number in polar form.
I tried multiplying the 2/(1+z) by the conjugate (1-z) on the top and bottom but I can't get it into the form 1-Tan(kA).
I think this involves trignometric identities and de Moivre's theorem.
 
  • #4
22
0
you write z as (cosA + i SinA) and multilply the denominator by (1+ CosA --iSinA)...Simplify it...
Answer will come
 

Related Threads on Complex number problem

  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
2
Views
10K
  • Last Post
Replies
3
Views
1K
Replies
7
Views
2K
  • Last Post
Replies
6
Views
1K
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
8
Views
3K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
5
Views
3K
Top